Joseph shaw



Pz- 'egnted Oct. 15, 1889.

J. SHAW.

MACHINE FOR GROOVING TIRES FOR CARRIAGE WHEELS.

(No Model.)

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FIGS.

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UNITED STATES I PATENT OFFICE.

JOSEPH SHAIV, OF MANCHESTER, COUNTY OF LANCASTER, ENGLAND.

MACHINE FOR GROOVING TIRES FOR CARRIAGE-WHEELS.

SPECIFICATION forming part of Letters Patent No. 412,801, dated October15, 1889.

Application filed July 2, 1889. Serial No. 316,276- (No model.) Patentedin England July 3, 1888, No. 9,623.

To all whom it may concern:

Be it known that I, JOSEPH SHAW, a citizen of the United Kingdom ofGreat Britain and Ireland, and a resident of Manchester, in the countyof Lancaster, England, have invented certain new and useful Improvementsin Machines for Grooving Tires for CarriagelVheels, (for which I havereceived a patent in Great Britain, dated July 3, 1888, No. 9,623,) ofwhich the following is a specification.

This invention relates to apparatus for prod uoing dovetailed grooves orundercut recesses in metallic tires for the wheels of coaches,carriages, and other vehicles for common roads, so that india-rubbertires or treads may be securely held therein.

In the ordinary methods of rolling metallic bars it is impossible toproduce a dovetailed or similar longitudinal groove or recess, and inorder to obtain such a cross-section it has been customary to take a barhaving a channel-section, and then by means of a costly system of rollsto turn over the edges of the bar in two or more passes through therolls.

According to these improvements I pass a bar having a flattened U orchannel section through a die, by means of which the edges orverticalmembers of the bar are turned inward and the desired cross-section isproduced. I thus avoid the necessity for an expensive system of rolls,such as has hitherto been necessary for the purpose.

I will describe my invention with reference to the accompanying sheet ofdrawings, in which Figure 1 represents a side View, and Fig. 2 an endView, of an apparatus constructed according to these improvements. Figs.3 and 1 represent details of the apparatus; and Fig. 5 is across-section of a rolled bar K, such as I prefer to employ, and whichmay be rolled from mild steel in the usual manner by ordinary rolls.

In each of the figures similar letters are employed to indicate similarparts or details of the apparatus constructed according to theseimprovements.

A is a spur-pinion, through which motion is transmitted from a suitablesource of power to the spur-wheel 13, upon the shaft of which the roll 0is fixed. This roll has two grooves or recesses formed in it for thereception of the vertical members of the bar, and it is carried insuitable bearings in the housings D. Instead of forming two grooves inthe roll, as represented, the part L, which enters the hollow of the barwhen in work, may be a collar or enlarged part of the roll, the diameterof which may then be uniform throughout, except in the collar, and equalto the diameter at the bottoms of the recesses, as shown in thedrawings. The bearings of the roll 0 are adjustable vertically by thescrews E E, as in ordinary rolling-mills, so as to provide for variousthicknesses of bars and to enable more or less pressure to be applied.Below the roll 0 there is a bearing-roll F, and beyond this, and withits upper surface in the same plane, a second bearing roll G. Above theroll G the die II is fixed, with its opening opposite to the grooves inthe roll 0. This die is carried by the brackets I, which support itagainst the strain to which it is subjected when in work. The sides M ofthe opening of the die are shaped to the outer contour of the sides ofthe tire and force the vertical members of the bar inward, when the baris caused to pass through the die. Elsewhere than at the sides M it ispreferred to give the die a considerable amount of clearness, asindicated in Fig. 4, so as to avoid unnecessary friction. The opening ofthe die is flared or trumpet-shaped toward the roll 0, so as to lead thebar and to effect the bending more gradually. For the same reason thelower part of the die, corresponding to the tread of the tire, is alsoleft open. The bearing-roll G, having its upper surface in close contactwith the lower part of the die, supports the bar during its passagethrough the die.

The apparatus having been set in motion, the heated channel-iron K isinserted between the rolls 0 and F, which then force it through the dieII. The end of the bar, as soon as it protrudes through the die, may beseized by suitable tongs or similar devices and dragged forward, so asto assist the passage of the bar through the die.

The grooved bar produced by the apparatus hereinbefore described is bentto the circumference of the wheel upon which it is to be fitted and iswelded so as to form a tire in the usual manner.

It will be understood that the described rolls are used merely for thepurpose of supporting and forcing the bar, and that they do notthemselves form the undercut groove, which is entirely produced from thechanneled bar by the die H. The rolls may be grooved parallel with theiraxes, as indicated in Fig. 4, to give them a better grip upon the bar.

Having now particularly described my invention, I declare that what Iclaim is- 1. In an apparatus for producing dovetailed and undercutrecesses in metal bars, the combination and arrangement of the roll 0with the bearing-rolls F and G and a die H, substantially ashereinbefore described, and as illustrated by the accompanying drawlI]0S.

E. In an apparatus for producing dovetailed and undercut recesses inmetal bars, the combination and arrangement of the bearing-roll G withthe die H, substantially as hereinbefore described, and as illustratedby the accompanying drawings.

In testimony that Iclaim the foregoing as my inventionl have signedmyname,in presence of two witnesses, this 20th day of J une,

JOSEPH SHAW. Witnesses:

G. W. ROWE, WM. E. WEYS.

